X-650

This fully modular power supply is an ideal solution for average desktop systems where low energy usage and reduced noise levels are the basic requirements. The highly reliable components built into this power supply assure that this unit is not only an energy saver but will also last a long time. In this manner users can save money by deferring their purchases by not having to buy a new unit for a longer period of time. Ease of installation, cost efficiency and reliability are the key features of this remarkable Seasonic product.

Benefits of this design

Reduced noise without increase in temperature;

Extended fan life due to the reduced number of fan rotations;

Optimized heat dissipation at all times;

Unsurpassed silent performance in Fanless Mode.

Additionally, there is a switch at the back of the power supply which allows users to customize their cooling needs by selecting between the Seasonic S2FC (fan control without Fanless Mode) and the S3FC (fan control including Fanless Mode).

Sanyo Denki Fan

The world-renowned Sanyo Denki ball bearing fans are made of the highest quality components to ensure ultra-low noise performance. The fan’s perfect balance and even rotations are achieved via the use of spoon-shaped, high-density plastic fan blades that are finished off with smoothed leading edges. Sanyo Denki fans are known for their strict tolerance ball bearings and precision copper axels. Instead of the industry standard of two balancing points they use three points to strengthen the mount and further stabilize the blade.

105 °C Japanese Capacitor

DC to DC Converter Design

The step down DC to DC converter design allows the power supply to be able to serve system components with various voltage needs. Not only is it a flexible, clean voltage conversion solution but it also maximizes the 12 V DC rail output, delivers superior dynamic response and , ultimately, provides for greater system stability.

Tight Voltage Regulation (3 %)

Specifications are subject to change without prior notice.
Note: Since the beginning of 2015, Seasonic has implemented changes in its retail box design and modular cables are now packed in a black cardboard box.

Hardware Secrets | Golden Award

December 12, 2012

“The new X-Series KM3 650 W is another flawless power supply from Seasonic, targeted to users who demand only “the best.” Its efficiency surpassed the numbers promised by the 80 Plus Gold certification, noise and ripple levels were very low, and voltage regulation was outstanding, with the main positive voltages (+12 V, +5 V, and +3.3 V) within 1% of their nominal values. The ATX12V specification allows a 5% deviation, and we usually consider units with 3% voltage regulation as “flawless.””